package org.example.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCLogin2 {
    public static void main(String[] args) throws SQLException {
        try (Connection connection = DBUtil.getConnection()){
            Scanner sc = new Scanner(System.in);
            System.out.println("Enter username: ");
            String username = sc.nextLine();
            System.out.println("Enter password: ");
            String password = sc.nextLine();
            //创建预编译SQL的执行对象
            String sql = "select * from user where username = ? and password = ?";
            PreparedStatement ps = connection.prepareStatement(sql);
            //设置占位符的值
            ps.setString(1, username);
            ps.setString(2, password);
            //执行SQL语句
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                String nickname = rs.getString("username");
                System.out.println("恭喜你,"+nickname+"登录成功。");
            }else{
                System.out.println("用户名或密码错误");
            }

        } catch (SQLException e) {
            throw new RuntimeException(e);
        }

    }
}
